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#include <stdint.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <sys/eventfd.h>
#include <osmocom/core/logging.h>
#include <osmocom/core/application.h>
#include <osmocom/core/utils.h>
#include <osmocom/core/select.h>
#include <osmocom/core/talloc.h>
static struct osmo_fd g_evfd;
static void *alloc_res_select;
static void *alloc_res_global;
static int destructor_called;
static int talloc_destructor(void *ptr)
{
printf("destructor was called automatically\n");
/* ensure the destructor is only called for the chunk allocated from the
* volatile select context */
OSMO_ASSERT(ptr == alloc_res_select);
destructor_called += 1;
return 0;
}
static int evfd_cb(struct osmo_fd *ofd, unsigned int what)
{
uint64_t rval;
int rc;
rc = read(ofd->fd, &rval, sizeof(rval));
OSMO_ASSERT(rc == sizeof(rval));
printf("allocating from select context\n");
alloc_res_select = talloc_named_const(OTC_SELECT, 23, "alloc_select");
OSMO_ASSERT(alloc_res_select);
talloc_set_destructor(alloc_res_select, talloc_destructor);
printf("allocating from global context\n");
alloc_res_global = talloc_named_const(OTC_GLOBAL, 42, "alloc_global");
OSMO_ASSERT(alloc_res_global);
talloc_set_destructor(alloc_res_global, talloc_destructor);
return 0;
}
const struct log_info_cat default_categories[] = {
};
static struct log_info info = {
.cat = default_categories,
.num_cat = ARRAY_SIZE(default_categories),
};
int main(int argc, char **argv)
{
int rc;
osmo_init_logging2(OTC_GLOBAL, &info);
rc = eventfd(0, 0);
OSMO_ASSERT(rc >= 0);
osmo_fd_setup(&g_evfd, rc, OSMO_FD_READ, evfd_cb, NULL, 0);
osmo_fd_register(&g_evfd);
/* make sure the select loop will immediately call the callback */
uint64_t val = 1;
rc = write(g_evfd.fd, &val, sizeof(val));
OSMO_ASSERT(rc == sizeof(val));
/* enter osmo_select_main_ctx() once */
printf("entering osmo_select_main\n");
osmo_select_main_ctx(1);
/* the allocation must have happened, and the destructor must have been called
* automatically exactly once */
OSMO_ASSERT(destructor_called == 1);
exit(0);
}
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